Rotary air pump



| F. EASTON 1,781,375

ROTARY AIR PUMP Filed Sep't. 3, 1929 2 Sheets-Sheet l &

Nov. H, 1930.

Nov. 11, 1930.

L. F. EASTON 1,781,375

ROTARY AIR PUMP Filed Sept. 3, 1929 2 Sheets-Sheet 2 fi g. J.

470 mo Z7 WATER Z5 Z72 U672 for Z0777 j 121621272 FFQSZQTZ 2 E55 I I wax w; 6 14 3, 151% J if Patented Nov. 11, 1930 LU'CIAN F. EASTOLN', OF LA CROSSE, WISCONSIN ROTARY AIR PUMP Application filed September This invention relates to a rotary air pump of the type which employs a rotor ooerating in a body of waterwhich by centrifugal action is driven to the periphery of the casing 6 and serves to trap a charge of air between each pair of rotor blades, which is thereafter expelled by the inward propulsion of the water due to a contraction in the peripheral wall of the casing.

The object of the present invention is to improve the construction and arrangement or the rotor and the method of sealing the same by a water seal; and the inventionrelates to the means provided for admitting water to 1 the interior of the rotor chamber, and to the configuration of the rotor blades and the wall of the casing.

The invention further relates to means provided for disabling the pump by the. escape TY of water from thcrotor chamber when it is desired to rotate the pump idly; and further to the means provided for insuring the re turn of water to the rotor chamber to cause a resumption of pumping operations.

These results are attained by the utilization of differential pressures within the rotor chamber and the outer casing respectively, and the pump is especially designed to utilize such difierentials in a manner presently to be 3 pointed out in detail.

The invention also relates to the general construction of the pump as a whole and the individual parts andelements thereof.

In the drawings:

: Figure 1 is a longitudinal sectional elevation of the pump in one of its forms, indicating a rangeof water levels which may be advantageously maintained in the outer chamber; Fig. 2 is a cross sectional elevation taken on line 2 of'Fig. 1.;

Fig. 3is a longitudinal sectional elevation of a modified arrangement of the pump, showing the water outlet and inlet ports difierent- 4 ly located; and Fig. 1 is a detail showing devices for automatically controlling the means for disabling the pump.

The pump, as shown inFigures 1 and 2, comprises a. boxlike casing which is com- 3, 1929. Serial No. 390,158.

posed of a main or body section 10 having a use 11, side walls 12, end walls 13, and a top wall 14:. As shown, this main or body section of the casing is integrally formed, although it might be otherwise constructed if so desired.

Within the center of the body section, and extending betweenthe side walls 12 thereof, is located acylindrical outer cross Wall 15 surrounding a cylindrical inner cross wall so 15, which circumscrihes a rotor chamber 16, the sides of which are provided by circular plates 17, which constitute in efiect continuations of the side walls 12, and serve to clamp the inner cylindrical wall 15 in place. This 05 gives to the inner section of the pump a drumshaped formation with a double cylindrical wall and flat sides.

Tntegrally formed with the outer cross wall 15 is an air inlet passage 18 into which is on To tered an inlet pipe 19 which leads from the heating system or other device orapparatus from which it is desired to exhaust the air, and which may be controlled by a check valve 20 presently to be described.

The upper portion of the air inlet passage extends vertically, but the lower portion extends obliquely, with the walls converging from circular to oblong cross section to the point where the passa 'e which continues 50 through the cylindrical cross wall 15 enters the rotor chamber, one of the walls 21 of the passage being extended inwardly beyond the other.

The wall 21 constitutes a terminus of a s5 thickened portion of the inner cylindrical wall 15*, and this thickened portion constitues a hlocloofi wall 22, the inner configuration of which is such as to afford a somewhat abrupt inward convergence from the normal curvature ofthe inner wall 15 to a curving surface 23, which is substantially coincident with the periphery of the rotor to allow a close clearance of the rotor blades.

Although, as shown in Figures 1 and 2, the air inlet enters the rotor chamber at a point near the top, and although the blockofi' wall is correspondingly located with respect to the aforesaid arrangement of the inlet passage, it will be understood that the particular arrangement shown in Figures 1" and 2 may be modified in'various ways without departing from. the spirit. of the invention. Fig. 3 presently to be described shows one of such possible modifications.

At the point where'the wall 21 of the inlet passage intersects the curved surface 23 of: the block-off wall,a knife edge 24 is formed, and it is atthis point that the water ring confined by the block-off wall 22. will be suddenly released from confinement and driven outwardly against the cylindrical wall 15 lVithin the rotor chamber thus configured is located a rotor 25 mounted upon a shaft 26. The rotor comprises a hub 27 from which extend a pluralityof arcuately formed blades 28, all of which, in the arrangement shown in Fig.1, curve forwardly or in a clockwise direction, which' is the direction of rotation of therotor in the form exemplified in Fig. 1.

The blades 28 are'connectedthroughout their centers by the provisionof. a ring shaped web 29, the outer edge 30 of which is c0inci-' dent with the tips of the blades, although,

. if desired, the blades or blade portions on opposite side of the web might be given a staggered arrangement without departing fromthe spirit of the invention. I

I The inner edge of the ring-shaped web merges into the hub, thus dividing the rotor into two sections or divisions, constituting in effect two pumps mounted on a single shaft,

7 although it is not deemed essential in allcases that theweb extendvin-wardly to the point of actual mer'gencewith the hub, since the side sections or divisions of the rotor mightin some circumstances be'in communication through openings inside or through the web, as the case may be. I v a Each of the blades, along each of its side edges, is provided with a groove or channel 32 which leads outwardly froin'the hub to thetop of the blade, audit will be noted from Fig. 2 that between the side walls 12 and the rotor a very slight clearance at all points may be afforded, the actual amount 'of the clearance being exaggerated in the drawings for purposes of illustration. This clearance through the clearance afforded between the rotor and theside walls 17. "I

The main or body portion of the casing, on

; each side thereof, is enclosed'by a drumshaped casting, comprising a circular side plate 34 having a circumferential flange 35 which is inturned to afford a ring-shaped marginal wall 36 which abuts against and is secured to the wall 12 by mean-s of through bolts 37, or in any other suitable manner. Thisarrangement furnishes outer side chambers 38 which communicatewith thebody chamber through upper and lower elongated ports 39 and 40. I

The top wall 14 of the body of the casing is apertured to receive an air discharge pipe 41, which may lead to the atmosphere or else whereas desired. The body portion of the casing is provided with upper plugs 42 and lower plugs '43, which afiordconvenient ac; cess to the interior.

The shaft 26 is ings 44 and 45, which are held in place within annular bosses 46 inwardly extending from the outersidefplates'34. The air entrapped within the rotorpockets is driven out through discharge ports 47 in the side plates 17 inxthe rotor'chamber at points inwardly'adjacent to the beginning of the block-off wall 22, and, as shown in the con ,struction in Fig. 2, below the axis of the rotor,

although therelative position of these por .tions of the apparatus may be modified, as,

for instance, in the construction shown in Fig. 3. The air thus discharged enters the outer side chambers 38 and is thence educted through the ports 39, and ultimately discharged through the outletpipe 41.

For simplicity, the drawings show the side plates17 secured by a'press fit within the ring-shaped marginal walls 36-, but'of course any other means, suchas screws or spring, may be used.

From experimentation it appears that the partial vacuum within the rotor chamber gradually diminishesfrom the inlet point to the discharge at the block-off, and'this vacuum condition tends to more or less balance the centrifugal force. 7

Assuming that the outlet from theouter chamber is adequate, atmospheric pressure will practically at all timesobtain here, being only slightly increased by the back pressure of the discharging air. It therefore fol- .1

lows-that during active operation of the um with the inlet ort- 18 in communica tion withthe return line of a vacuum system,

or other apparatus from which thefree a'dmission of atmospheric air is normally eX- ournalled through bush- 7 cluded,.a lower pressurewill obtain within the rotor'chamberparticularly near to the inlet port where the vacuum creating action is greatest. From thisit results that whenever the pump operatesv there will be a tendr encyof .the water in the outer chamber to pass into the rotor chamber through all openings andclearances except where actually opposed by out discharging air; This'tendencywill, of course, be greater theliigher the vacuui'n condition, and under certain predetermined conditions will be suflicient to maintain an adequate supply of water for operating the pump.

The high and low water lines shown in Figures 1 and 3 merely indicate a close approximation of limiting levels to be maintained in the outer chamber, in order that there may be an adequate supply for operating the pump, and onthe other hand not too much to cause an overloading of the motor driving :the pump. These levels will change by flow from or to rotor chamber.

In order to provide a duct for the inflow otthe water, the outerwall of the rotor chamber is provided at its lowermost point with a plug 48 having in it a duct 49 which establishes communication with an annular groove or channel 50 whichis formed between the circumferential walls 15 and 15 respectively, and which communicates with the inlet duct 18. A different arrangement of these features is shown in Fig. 3, which will be presently described. v

V] hen differential pressure conditions are established, the water will be admitted to the rotor chamber through the duct and through the channel above described, so as to maintain a sufficient quantity of water in the rotor chamber to cause the pump to etfectively operate.

A water outlet plug 51 is entered through the side wall of the rotor chamber, and provided with a duct 52, which is of proper dimensions to restrict the discharge of water from the chamber so long as there is an excess of pressure in the outer chamber as com pared wi h the pressure maintained in the rotor chamber, but when communication with the atmosphere is established, the water is thrown out by centrifugal force, and with the large volume of air admitted to take its placeis soon all expelled,and as the vacuum is reduced, less water is drawn in through the duct l9 and the channel 50.

The pi e 19 is shown as provided with a coupling 53, onebranch of which connects with a pipe 54, which affords ingress for atmospheric air or gas. The admission of atmospheric air or gas may be regulated manually orautomatically, but whenever such air or gas is admitted, it will tend to reduce the differential in pressure, that is, to establish quail pressure in the rotor chamber and in the outer chamber, so that under such conditions the action of the pump will be 'di.- abled so long as free. communication with the atmosphere is maintained.

The check valve20, if employed, is located in the return line'from the vacuum or other system from which airis to be exhausted, and it comprises a casing 55, having at its lower end a valve seat 56 against which a valve 57 seats. i

The valve 57 is provided with a valve stem sistancc in the valve 57 is when starting with an absence of vacuum conditions in the system. "When, however, normal vacuum conditions have once been established, the resistance is no longer necessary, so that instead of a permanent resistance in the form of a spring,a hand operated resistance can be used until vacuum conditions are established in the system.

In Fig. 3 I have shown a modification which consists mainly in a re-positioning of the inner and outer walls of the rotor chamber with respect to one another. In this instance, the outer wall 15 stands as previously described, but the inner wall 1550 has been turned or. rotated to reverse position of the block-off wall 220 and to bring the air inlet at the end 210 of the block-0H wall to a point substantially at the base of the rotor chamber. The water inlet duct 49 is thus located in close proximity to the air inlet port, so that the water will more readily enter through the channel 50, which may constitute an advantage, in that it does not require the water to be lifted to the degree indicated in Fig. 2.

Also in Fig. 3 I have shown the water outlet duct 520 located at the top of the rotor chamber and formed in a pipe or tube 510 which extends through and above the casing and is threaded to receive an adjusting valve stem 511 operable by a handle 51 2, which permits regulation of theoutflow of water through the duct 520, to the degree required to give maximum efficiency. In this case, also, the side plates, numbered 170 in Fig. 3, have been shifted 180 to bring the air discharge port 470 to a higher point than previously indicated. This arrange ment allows of a greater variation in the rise and fall of the water in the outer chamber, as indicated by the dotted high and low water lines, the low water line being located at the lowest level in the outer casing at which water will run into the rotor chamber, to resuscitate the pump afteraperiod of disablement. The high water line is not intended to indicate the highest point at which the pump will operate, but an increase in the volume of water above that indicated will require somewhat more power to operate as more or less water will pass through the rotor chamber. i i i It will be noted that inFig. 3 the discharge port 470 is'located at thehighest possible 4:70,.even when high vacuum conditions are point, and that the water outlet port 520 jisf located in close proximity to the end of the block-01f wall, which will result in a continual discharge of waterthrough the port maintained. e V

I However, it will be understood that the water outlet 52 (or 520 as thecase may be) may be located in any convenient location, so long as it is not-so near the inlet as to afford an air leak intothe rotor chamber.

It will also beunderstood that although this outlet is shown in Fig. 3 as being manually.

controlled, it maybe automatically cone trolled in a manner presently to be described; The discharge of water from the rotor chamber is due in-the main to centrifugal force which is more or less retarded in lts action byvacuum conditions in the rotor mechanicalaction of centrifugal force will be most efiective due to-the impingement of the revolvln 'water a alnst the abrupt ter- ZT a.

minus of the block-oft wall, so that thesevarious "factors effectively combine in the forcibleejection of entrapped air through the air discharge port, especially in the form of constructionfshown in Fig. 3. v

"With regard to the replacement of water the size of the inlet ill-(or 4:90) can be such that it will not easilystop'up, but not so much thatthe water outlet will be unableto take care of'the admittedwater. For convenience andsimplicity, the size of this inlet is fixed, although it might be controlled either automatically or otherwise.

The quantity of water drawn in will be greater the higher the vacuum, so that as the vacuum isyreduced by the free admission of atmospheric air, the inflow of water will be reduced, thereby tending to disable the pump, so that both theinlet and outlet from the rotor chamber will work together to the same end.

' In Fig. i I have diagrammatically shown means for automatically regulating the ad- (,1; justment 'of the valve stem wlnch controls the water outlet port. 'In'this instance the valve stem 513 which controls the port 520 is con; nected by a link 63 with alever :64,the free ,end of'which is balanced between bellows 65 and 66, the former of which connects bya pipe 67 With'a portion of the system responsive to a water pump pressure, while the bellows66 connects by a pipe 68 with a portion 'ofthe systeln'responsive tothe boiler pressure in a vacuum heating system, orit may be principles of operation defined in my ing pressure will cause a closingof the port 520' to restrict the discharge of water from the rotor chamber in therehabilitatingof.

the pump, ingeneral accordance with the copending application, Serial No. 371,200, filed June 15,1929. Q

As shown, the bellows responsive to boiler pressure meets a condition sometimes present in vacuum heating where there may be vacuum in both pump and boiler, except that when the pumpis running thevacuum will be less in the pump than in the boiler and waterwill pass fromthe pump to the boiler. In other words, the valve is seated by. a fall in pump'pressure and not byv a rise in boiler pressure, or the valve may be said to be seated by excess of boiler pressure over pump pressure, andvice versa the valveis opened by. an excess of pumppressure over boiler pressure. J

Fig. 4 merely serves to exemplify one of a number of automatic arrangements which may be utilized in connection with the pres ent invention for affording an automatic control of conditions determining the operation "ofthe pump of the present invention. which is drawn-in by the suction of the pump,

Operation In operation, the water will'be admitted,

to the chamber within the central or body portlon of the casing and will thence distribute itself'to the side chambers and find ingress into the motor chamber through the centralapertures 33 and through the clearances afforded adjacent the rotor blades. As the blades are rotated, they will maintain a constant outward flow of water through the grooves or channels 32 and throughtthe clearance, and thus'serve to maintain a water seal or water-packing to the extent, ifany re- I quired to afiord a seal against the escape of air. .The waterthus admitted and main-- tained within the rotor chamber, together with water drawn in through the port 49 (or 490), will undercentrifugal action, assume the form of a ring, whichring willtravel at a high velocity around the circumferential wall of the rotor chamber. 7

" When the water ring reaches the area of relative confinement afforded by the abruptly lib by the block-oft wall 22 will suddenly be released from confinement at the knife edge 24 and will flow outwardly in more or less disturbed or agitated condition, and at this point the air or gas entering through the channel 19.20 will break through the water ring andbe trapped within the pockets between the rotor blades.

By configuring the wall of the rotor chamber in the manner indicated, and by giving the block-oii wall 22 a relatively abrupt inward convergence, the air will be suddenly expelled by the inthrust of the entrapped water at the point of discharge, and, coincidentally with the sudden confinement of the water at the air discharge point, the water will be suddenly released from confinement at the air inlet point, and these two actions tend to balance against one another; or, in other words, a hydraulic balance is main tained, which increasesthe effectiveness of the pumping action. This arrangement is more desirable than one in which the progressive confinement of the water is gradual throughout a considerable portion of the line of travel of the water ring, since in practice he quickacting block-off not only pumps more air but with less actual expenditure of power as comparedwith a construction having a gradual block-oil.

The pumping action of the rotor tends to maintainan increased pressure in the outer chamber as compared with conditions with- .intherotor chamber, and this diiierential in pressure assists in the-.maintenanceof a water flow through the clearance and through the grooves 32 in the rotor blades, and supplements the centrifugal action of the rotor in the maintenance of a water packing, which is efl ective'in confining the air or gas within the pockets between the rotor blades 'anddischarging it through the ports 47.

, When, however, atmospheric air or gas is admittedthrough the pipe 54, the equaliza- .tion of pressure conditions within the rotor chamber and within the outer chamber will causea reduction in the quantity of water in the rotor chamber to a point below the amount required for normal operation, so

that water will be expelled from the rotor chamber to the degree required to unload the pump and permitit'to operate idly with a minimum expenditure of power until the admission of atmospheric air or gas isagain reduced,.which again increases the inflow of water to the rotor chamber to the amount tively few parts of arcuate construction properly designed to secure high eificiency in operation. By properly locating the water outlet port52 (or 520) andthe water inlet port 4E9 (or 490), and by properly restrictingthe dimensions of these 'ports with relation to the proportions and arrangement of the rotor chamber, it will be possible to satisfactorily control the disabling and reconditioning of the pump solely by the admission of atmospheric air or gas without the employment of valves or similar automatically cont-rolled devices for establishing the required conditions, although the employment of such de: vices, as-indicated, for example, in Fig. l, is contemplated, and the same may be employed where conditions require, or where the eiliciency in operation will be increased.

The present invention represents a satisfactory simplified form in which the results are attained in the manner described, but it is not the intention, unless otherwise indicated in the claims, to restrict the invention to a device of the simplified form shown, since modifications thereof are contemplated and are deemed to be within the scope and principle of the present invention.

Furthermore, it will he miderstoodthat in the description, such expressions as top, bottom, and sides, are used for purposes of convenience, but that a repositioning of the device, or a re-locating of parts in positions other than those heretofore described, is within the scope of the invention.

I claim:

1. In a rotary pump of the combination ofia casing providing an inner rotor chamber and an outer chamber, means for affording a discharge of liquid from the rotor chamber into the outer chamber, means for affording a duct for liquid from the lower portion of the outer chamber to the rotor chamber, arotor within the rotor chamber adapted to draw in air or gas to the rotor chamber and expel the sametherefrom through the action of the liquid associated with the rotor in the normal operation of the device, and to maintain lower pressure conditions within the rotor chamber during normal operation than in the outer chamber-,and means for admitting excess of air or gas to the system to substantially equalize pressure conditions within the rotor chamber and the outer chamber, with a resultant discharge of liquid from the rotor chamber into the outer chamber tolower the liquid level in the rotor chamber below that required for effective operation, the liquid duct affording a passage for the return of liquid from the outer chant berto the rotor chamber after admission of extraneous air or gas cut 0a.

2. In a rotary pump of the class described, the combination of a casing affording an inner rotor chamber and an outer chamber, a rotor journalled to rotate within the rotor chamber and having blades provided along I one edge with a groove adapted to coact with nication near the axis of the rotor, to provide the class described,

for the inflow of liquid to communicate with said grooves. V

i 3. In a rotary pump of the class described, the combination of a casing affording an inner rotor chamber and an outer chamber, a

7 rotor journalled to rotate within the rotor chamber and having arcuately extending blades curving forwardly toward the d rection of rotation, providedalong one edge with'a groove adapted to coact with the adjacent wall of the rotor chamber in the maintenance of awater packing, and the inner and outer chambers being in communication near the axis of the rotor, to provide for the inflow of liquid to communicate with said grooves. 1

-' 4. In arotary pump of the class described, the combination of a casing providing an inner rotor chamber and an outer chamber, a'

rotor journalled Within the rotor chamber, the rotor chamber having a peripheral wall located throughout a portion of its extent at f a substantial distance from the periphery of the rotor, and having a block off wall 'throughout'the remainder of its extent in close proximityto theperiphery of the rotor,

the block ofi wall merging abruptly into the i more distant peripheral wall, an inletpassage communicating with the rotor chamber at a point immediately. beyond the opposite end of the block off wall, and an air or gas discharge port- "openi-ng outwardly through the side Wall of the rotor chamber at a point in proximaterelation to'the first mentioned abrupt terminus of the block olf wall.

-, 5. In a rotary pump of the class described,

7 the combination of a casing providing an inner rotor chamber and an outer chamber,

a rotor journalled within the rotor chamber,

the rotor chamber having a peripheral wall located throughout aportion'of its extent at asubstantial distance from the periphery of the: rotor, and having a block off wall throughout the remainder of its extent in close proximity to theperiphery of the rotor,

the block'ofi wall merging abruptly intothe morefldistant peripheral wall, an inlet passage communicating with the rotor chamber at; apoint immediately beyond the opposite end of the block off wall, and anlair or gas discharge port opening outwardly through the side wall of the rotor chamber at a point in proximate relation to the first mentioned abrupt terminus of the block off wall, the air or gas discharge port and said terminus of the block off wall beingboth located below the axis of the rotor.

V 6, In a rotary pump of the class described,

the combination Of ttjl'Ot-Ol chamber'having aninlet for the passage of air or gas thereinto and an outlet for discharging air or gas therefrom, a contamerfor liquid located exteriorly of the rotor chamber and having communication with the interior of the rotor chamber, a rotor within the'rotor chamber,

adapted when liquidlis maintained to an opera-ting level to utilize said liquid in maintaining within the rotor chambera relat-iv'ely reduced pressure as compared'with the pressure in the exterior liquid receptacle and in the inlet to the rotor chamber, for dra w-v 1 ing air or gas into the rotor chamber and dlS- charging the same therefrom, and 7 means 7 tending to equalize the pressure in the rotor.

chamber and in said liquid receptacle to redu'ce'the-liquid level in the rotor chamber below the operating level to disable the pumpingaction.

the combination of a casing providingan inner rotor chamber having an inlet for the passage of air or gas theretinto and an outlet for discharging air or gas therefrom, an outer chamber and means afiording communication for-the passage of liquid between the chami bers, arotor within the rotorchamber adapted whe 'rliquid is maintained-to an operating a level to utilize 'said liquid' 'in maintaining '7. In a'rotary pump of'the class described, 7

8. In a rotary pumpofthe classd'escribed, i

the combination of a casing providingan inner rotor chamber having an inlet for the pas;

sage of air or g as'therein to and an outlet for "discharging air or gas therefrom, anouter chamber and means affording communication for the passage ofliquid between the chain-. bers, a rotor within the rotor chamber adapt;

red when liquid is maintainedto an operating j level to utilize said liquid in I maintaining within the rotor chamber a relatively reduced pressure as compared with-the pressure 1n the outer-chamber and intheinlet to therotor chamber for drawing air or gas into the rotor chamber and discharging the sametherefrom,

no" I and 'meansfor admitting additional air or 5 gas "to jthezrotor chamber to more nearly equalize -the" pressure in the rotor chamber and the outer'chamber 'toreduce the liquid level in the rotorchamber below the 'operating level to disable thepumpingaction." V 9.111 a rotary pump of the classdescribed,

thecombination of acasing'providingan inner rotor'chamber having an inlet for the passage of air or gas thereinto and an outlet for discharging air or gas therefrom,. .a n outer chamber, and means .al'fording communication for the passageof liquid between the chambers, arotor within the rotor chamber, J adapted when liquid-is maintained toan op f erating, level to uitilize said-liquid inmain taining within the rotor, chamber; a relatively reduced pressure as compared With the pressure in the outer chamber and in the inlet to the rotor chamber for drawing air or gas into the rotor chamber and discharging the same therefrom, and means for admitting additional air or gas to the rotor chamber to more nearly equalize the pressure in the rotor chamber and the outer chamber to reduce the liquid level in the rotor chamber below the operating level to disable the pumping action, and a check valve for controlling the ingress of air or gas through the inlet to the rotor chamber.

10. In a rotary pump of the class described,

thecombination of a casing providing an inner rotor chamber having an inlet for the passage of air or gas thereinto and an outlet for discharging air or gas therefrom, arotor Within the rotor chamber, adapted When liquid is maintained at an operating level to utilize said liquid for passing air or gas from the rotor chamber a chamber exterior to the rotor chamber, passages between the chambers providing inlet and outlet for liquid only into and out of the rotor chamber, and means for controlling the flow through such passages and adapted in one adjustment to permit an excess of liquid to flow out of the rotor chamber to disable the pump and in another adjustment adapted to permit an excess of liquid to flow into the rotor cham her to enable the pump to resume its pumping function.

In Witness that I claim the foregoin I have hereunto subscribed my name this 2 th day of August, 1929.

LUCIAN F. EASTON. 

